Every light is green. Nothing works.

2 laptopsNo internetAll dashboards greenEvery lookup fails

Fabricated data. No real patients.

By Berkan Mertan, Dhruv Arora, Ioli Shrivastava and Aditya Bankoti · GitHub

Cedar Hollow status board

Last checked 12:00:02, offline site
clinic-backend on laptop-aactive (running)
GET /healthz200 OK
clinic-portal on laptop-bactive (running)
systemctl --failed0 units

One bash script packs up the evidence.

laptop-a · backend192.168.50.10
    laptop-b · portal192.168.50.11

      Wheel the box up to the sick server and plug it in.

      nazar watchereno2
      Bundle inbox
      Waiting for evidence.

      RAG: find the evidence, then answer.

      Model alone
      "Firewall rule?"
      no sourcewrong
      Model + retrieval
      "DB_HOST → removed host"
      backend.envmigration noticefix: 127.0.0.1

      Chunks: every file is cut along its own structure.

      Rule

      The AI searches with keywords.

      BM25

      Then it follows shared facts.

      EXPAND
      Got back

      Embeddings: link chunks that sound alike.

      The AI never sees this. Screen map only.
      Similar ≠ cause

      The AI works the case. Max 5 turns.

      Agent trace qwen3.5:122b · local

      No rounds run yet.

      Hypotheses

      Every claim points at a real line. A person applies the fix.

      SymptomLookups fail. Service up. /healthz green.
      CauseDB_HOST=db-primary.cedarhollow.internal
      ProofENOTFOUND on every lookup
      WhyHost removed 2026-04-30. Records now on 127.0.0.1
      Ruled outFirewall   Connection pool
      Fix
      - DB_HOST=db-primary.cedarhollow.internal
      + DB_HOST=127.0.0.1
      $ systemctl restart clinic-backend
      Source

      Click a footnote.

      All together.